Properties of the Number 19219

Nineteen Thousand Two Hundred Nineteen

Basics

Value: 19218 → 19219 → 19220

Parity: odd

Prime: Yes

Previous Prime: 19213

Next Prime: 19231

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 19219

Divisors: 1, 19219

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101100010011

Octal: 45423

Duodecimal: B157

Hexadecimal: 4b13

Square: 369369961

Square Root: 138.63260799682016

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes having only {1, 2, 9} as digits. A385776

a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (Lucas numbers). A24319

Primes p = prime(i) of level (1,3), i.e., such that A118534(i) = prime(i-3). A118467

Primes of the form XYX, where Y is a single digit. A154270

Primes that are the first in a run of exactly 4 emirps. A346024

Primes p such that the decimal digits of p² can be partitioned into two or more nonzero squares. A48646

a(n) = 20·n² - 1. A158491

Expansion of 1/(1 - ∑_k>=0 x^(2·k+1²)). A280863

Primes of the form abcabc..abcab. A228627

Numbers k such that 15·2^k + 1 is prime. A2258